style(admin): inline style 全面改用 CSS class（PR-H）

admin/ 的 inline style= 由 348 處降到 9 處，剩下的 9 處全是 CSS custom
property 載體（--wpdo-bar-width / --wpdo-cov-pct 等動態數值），與來源外掛的
設計一致。

- wpdo-admin.css 543 → 911 行：補上 148 個 class（來源檔在 selector 與
  rule-block 層級都是既有內容的超集，逐條核對過），另加 .wpdo-form-inline
- 5 個變數改為 class 版本：$mode_cls / $badge_mode_cls / $diffs_cls /
  $ap_cls / $e_mode_cls；3 個 stress-test template 補 $mode_text_cls /
  $mode_card_cls
- 刪掉因此變成孤兒的 $mode_badge / $style / $mode_style / $badge_style /
  $e_mode_bg / $badge_bg
- entity card 改 .wpdo-eb-card、pipeline dot 改 .wpdo-stage-pill、demote 按鈕
  改 .wpdo-eb-btn-dim；.wpdo-native-counts / .wpdo-recommendation /
  .wpdo-setup-banner-btn 的重複 inline style 移除
- dashboard 的 top-views 查詢一併改用上一個 commit 的 TMDO_Zone_Warm::VIEW_KEY

PHPStan 抓出自動轉換造成的 11 個未定義變數，已全數補回定義並複驗。

admin/class-tmdo-dashboard-widget.php

@@ -79,7 +79,7 @@ class TMDO_Dashboard_Widget {
 		.wpdo-widget-actions a { margin-right: 0.5em; }
 		</style>
 
-		<p style="font-size: 1.1em; margin-bottom: 0.6em;">
+		<p class="wpdo-widget-intro">
 			<span class="wpdo-widget-light <?php echo esc_attr( $light['class'] ); ?>"></span>
 			<strong><?php echo esc_html( $light['label'] ); ?></strong>
 			<?php if ( $status['streak'] > 0 ) : ?>
@@ -95,7 +95,7 @@ class TMDO_Dashboard_Widget {
 		</p>
 
 		<?php if ( '' !== $status['summary_msg'] ) : ?>
-			<p class="description" style="margin-bottom: 0.8em;"><?php echo esc_html( $status['summary_msg'] ); ?></p>
+			<p class="description wpdo-mb-2"><?php echo esc_html( $status['summary_msg'] ); ?></p>
 		<?php endif; ?>
 
 		<div class="wpdo-widget-stats">
@@ -113,7 +113,7 @@ class TMDO_Dashboard_Widget {
 					<strong><?php echo esc_html( (string) (int) $status['conflicts'] ); ?></strong>
 					<?php if ( (int) $status['conflicts'] > 0 ) : ?>
 						<a href="<?php echo esc_url( add_query_arg( 'tab', 'conflicts', $page_url ) ); ?>"
-							style="margin-left:0.5em;"><?php esc_html_e( '查看', '2meet-data-optimizer' ); ?></a>
+							class="wpdo-mt-1"><?php esc_html_e( '查看', '2meet-data-optimizer' ); ?></a>
 					<?php endif; ?>
 				</span>
 			</div>
@@ -140,7 +140,7 @@ class TMDO_Dashboard_Widget {
 		if ( $actionable_count > 0 ) :
 			$ms_url = add_query_arg( 'tab', 'module-suggestions', $page_url );
 			?>
-			<p style="margin: 0.6em 0; padding: 0.5em 0.7em; background: #fff8e5; border-left: 3px solid #dba617; border-radius: 3px;">
+			<p class="wpdo-widget-notice wpdo-widget-notice-warn">
 				🤖 
 				<?php
 				printf(
@@ -162,7 +162,7 @@ class TMDO_Dashboard_Widget {
 		if ( ! empty( $attn['needs'] ) && 'running' !== ( $attn['job_state'] ?? '' ) ) :
 			$wizard_url = add_query_arg( 'tab', 'migration-wizard', $page_url );
 			?>
-			<p style="margin: 0.6em 0; padding: 0.6em 0.8em; background: #fef0f0; border-left: 3px solid #dc3232; border-radius: 3px;">
+			<p class="wpdo-widget-notice wpdo-widget-notice-error">
 				🔴
 				<?php
 				/* translators: 1: EAV row count, 2: group count, 3: ratio. */
@@ -177,7 +177,7 @@ class TMDO_Dashboard_Widget {
 				<a href="<?php echo esc_url( $wizard_url ); ?>"><strong><?php esc_html_e( 'User 遷移精靈 →', '2meet-data-optimizer' ); ?></strong></a>
 			</p>
 		<?php elseif ( 'running' === ( $attn['job_state'] ?? '' ) ) : ?>
-			<p style="margin: 0.6em 0; padding: 0.6em 0.8em; background: #e5f5fa; border-left: 3px solid #00a0d2; border-radius: 3px;">
+			<p class="wpdo-widget-notice wpdo-widget-notice-info">
 				⏳ <?php esc_html_e( 'User 遷移精靈正在執行中 —', '2meet-data-optimizer' ); ?>
 				<a href="<?php echo esc_url( add_query_arg( 'tab', 'migration-wizard', $page_url ) ); ?>"><?php esc_html_e( '查看進度', '2meet-data-optimizer' ); ?></a>
 			</p>
@@ -195,7 +195,7 @@ class TMDO_Dashboard_Widget {
 				number_format_i18n( (int) $gc['total'] )
 			);
 			?>
-			<p style="margin: 0.6em 0; padding: 0.6em 0.8em; background: #f6f7f7; border-left: 3px solid #2271b1; border-radius: 3px;">
+			<p class="wpdo-widget-notice wpdo-widget-notice-neutral">
 				🧹
 				<?php
 				/* translators: 1: total rows, 2: transients, 3: wp_old_date, 4: edit_locks */
@@ -208,12 +208,12 @@ class TMDO_Dashboard_Widget {
 					esc_html( number_format_i18n( (int) $gc['edit_locks'] ) )
 				);
 				?>
-				<form method="post" action="<?php echo esc_url( $page_url ); ?>" style="display:inline">
+				<form method="post" action="<?php echo esc_url( $page_url ); ?>" class="wpdo-form-inline">
 					<input type="hidden" name="wpdo_postmeta_cleanup" value="1">
 					<?php wp_nonce_field( 'wpdo_postmeta_cleanup' ); ?>
 					<button type="submit" class="button-link"
-						onclick="return confirm(<?php echo wp_json_encode( $confirm_msg ); ?>);">
-						<strong><?php esc_html_e( '一鍵清理 →', '2meet-data-optimizer' ); ?></strong>
+					onclick="return confirm(<?php echo wp_json_encode( $confirm_msg ); ?>);">
+					<strong><?php esc_html_e( '一鍵清理 →', '2meet-data-optimizer' ); ?></strong>
 					</button>
 				</form>
 			</p>
@@ -246,7 +246,7 @@ class TMDO_Dashboard_Widget {
 					'%2$s'
 				);
 			?>
-			<p style="margin: 0.6em 0; padding: 0.6em 0.8em; background: <?php echo esc_attr( $post_bg ); ?>; border-left: 3px solid <?php echo esc_attr( $post_color ); ?>; border-radius: 3px;">
+			<p class="wpdo-widget-notice <?php echo $total_eav > 0 ? 'wpdo-widget-notice-warn' : 'wpdo-widget-notice-ok'; ?>">
 				📦
 				<?php
 				if ( $total_eav > 0 ) {
@@ -276,7 +276,7 @@ class TMDO_Dashboard_Widget {
 		<?php endif; ?>
 
 		<div class="wpdo-widget-actions">
-			<form method="post" action="<?php echo esc_url( $page_url ); ?>" style="display:inline">
+			<form method="post" action="<?php echo esc_url( $page_url ); ?>" class="wpdo-form-inline">
 				<input type="hidden" name="wpdo_run_health" value="1">
 				<?php wp_nonce_field( 'wpdo_run_health' ); ?>
 				<button type="submit" class="button button-small button-primary"><?php esc_html_e( '跑健康檢查', '2meet-data-optimizer' ); ?></button>
@@ -284,12 +284,12 @@ class TMDO_Dashboard_Widget {
 			<a class="button button-small" href="<?php echo esc_url( $bridge_url ); ?>">
 				<?php esc_html_e( 'Entity Bridge', '2meet-data-optimizer' ); ?>
 			</a>
-			<form method="post" action="<?php echo esc_url( $page_url ); ?>" style="display:inline">
+			<form method="post" action="<?php echo esc_url( $page_url ); ?>" class="wpdo-form-inline">
 				<input type="hidden" name="wpdo_create_snapshot" value="1">
 				<?php wp_nonce_field( 'wpdo_create_snapshot' ); ?>
 				<button type="submit" class="button button-small"><?php esc_html_e( '建立快照', '2meet-data-optimizer' ); ?></button>
 			</form>
-			<a href="<?php echo esc_url( $page_url ); ?>" style="float: right; padding-top: 4px;">
+			<a href="<?php echo esc_url( $page_url ); ?>" class="wpdo-widget-link-right">
 				<?php esc_html_e( '完整儀表板 →', '2meet-data-optimizer' ); ?>
 			</a>
 		</div>